Trolley-retriever.



PATENTED JUNE 18, 1907.

G. I. EARLL.

TROLLBY RETRIBVER. nruommx Hum 00224, 1904.

No. 357,040. PATENTED JUNE 18. 1907 0. I. EARLL. TROLLEY RBTRIEVBR.

APPLICATION FILED DOT. 24. 1904.

' iSEEETS-SHEET 2 WITNESSES: M 5 INVENTOR y KW *PATENTED JUNE 18, 1907.

c. 1. BARLL. TROLLEY RETRIEVER.

APPLIOATION FILED 001'. 231. 1904.

4 SHEETS-SHEET 3.

R 0 I. N E V N PATEN'IED JUNE 18, 1907.

C. I. EARLL TROLLEY RETRIEVER. APPLICATION FILED 00124. 1904.

4 SHEETS-SHEET 4.

R 0 T N E V N NKTEEF orrrefa.

enemas I. EARLL, or NEW ORK,N. Y.

'mouEv-RETenz-viziq.

3 New York, have invented certain new and "Improvements in Trolley-Retrievers, of which the following is a specification.

v My invention relates to trolley retrievers. In devices of this class there is a drum adaptr'aj ed'to receive the trolley rope, alight tensibn "spring adapted to act upon the rope to take u the, slack therein but with power insultificrent to pull the pole down and a heavy or "powerspring to pull the pole down, normally in a set or strained condition and adapted to be put-into action by the rapid rotation or sudden impulse given to the drum when the trolley jumps the wire. In all devices of this class the power spring relaxes or unwinds in the'act of pulling down the trolley, and in. f order to-restore it to its normal condition so that it will be ready when called upon to pull 'the'pole down again it is necessary to set or wind up the spring. This is usually accomplisheilbypulling out the rope frdm the retriever against the action of the power sprine, meansbeing providedto hold one end of the spring against rotation and to cause the operation of setting.

As is well known retrievers are usually attached to the rear ends otcar' and they. are left. in charge of conductors Whose duty it is to set the retriever and to restore the trolley In some of the retriever-s hereto the wire. -'tofore in use, it has been necessary for the conductor to operate levers or pawls eitherbelore-or' after, or both before and after pulling out the rope to set the retriever to its normal condition, This manner of operating the retriever is objectionable because it places an extra burden upon the conductor and because the conductor may neglect to perform some or all of the operations necessary to put theretrievor in proper condition and again, because it requires greater time and e'i'lort on the part of the conductor to "learn to properly operate the retriever. Other retrievers have been "which, while not requiring manual.operation of levers Or'paWls for setting, have required I a long continuous pull, without interruption,

upori the trolley rope, which pull ii not'completed results in the pole being brought back again to its depressed or lowered position, and wluch 1f completed while the car is m Specification of Letters Patent.

Application filed October 24, 1904. Serial No. 2251.731.

other end to turn with the drum during the constructed.

IPatented June 18, 1907.

motion permits the pole to rise above and strike the span wires, for it impracticable it not impossible for the conductor to guide the trolley back to the wire at the same time that he is pulling out the rope to set the re triever.

The object of my invention is to provide a retriever for trolleyswhioh may be set by merely. taking hold of the trolley rope with out the necessity oi having to operate manually any pawls, levers or other mechanism before, during or after the setting, one in which the power spring is locked against unwinding at mtervals during the sett ng so .that it may be set in stages or steps without maintaining a continuous pull of the rope against the action of the spring, one in which the setting may be performed by reciprocating the rope back and forth into and out of the retriever in a plurality of strokes, one in which after the retriever has operated to pull down the .pole it is in a condition in which it will take in slack rope under the action of the tension spring after the retriever spring has been wholly relaxed and begin at once to set the retriever spring when rope is withdrawn and one in which the setting mechanism is automatically thrown into operative condi tion when the retriever spring has relaxed below a predetermined limit.

My object is further to provide a trolley the power-spring when the spring has relaxe or unwounda predetormmedl amount,

and which shall remain in an opcrativecondition until the retriever is setup-to predetermined amount, and further-in providing a mechanism whiclrshall he capable of retaining less than theyluil amount of set in case the opcratimi ol setting is stopped before completion, and which shal I nit the tension spring to take in slack-when the retriever spring is wholly rclaXed or only partially set. i

My invention consists further in providing 'eter and having a portion of larger diameter a trolley rope having that portion which is wound on the drum of relatively small diamadapted to come in position convenient to be grasped by the conductor in the act of setting the retriever.

My invention consistsin other :novel devices and features of construction to be hereinafter more fully pointed out and described. In carrying out the preferred form of my invention I provide a -suitable frame or case in which is 'mounted a central shaft. Upon this shaft is mounted a sheave or drum adapted to receive the trolley rope. The drum is provided with an intermediate web 'and an elongated hub forming recesses on either side of said web in the outer of which is placed the tension spring which has one end secured to the drum and the other end to a stationary inwardly projecting hub. The 2 -the power spring. .The' bell crankis operated tension spring is of suflicient power to pro duce a tension in the trolley rope of from twoto four pounds.

It acts atall times upon the drum and its purpose is to take'up the slack rope. In the recess in'the drum on the op posite side of the web is placed the retrievingor'power spring which has its outer end se curedpto the drum and'its'inner end to the sleeve or hub of an intermediate pawl carrying member. The-sleeve of the intermediate member fits loosely on the hub of the drum this relationbeing such that if the intermediate member is held against rotation and the drum is caused to revolve by unwinding the trolley rope therefrom it will wind up the power "spring and put the same in a.

strained condition.

The intermediate member is provided with a stud on which is mounted a pawl and'thedrum is provided with aflange which pro jects toward the intermediate membenthe said flange being provided with'teeth adapted to be engaged by the said pawl, the relation being such that when the retrieving spring is wound up saidpawl which will be v referred to hereinafter as the main lock pawl,

will drop into engagement with the teeth on the-drum' and retain the retrieving spring against unwinding or relaxing.

A normally stationary member. or ratchet ring 1s.mounted in the frame of themachine 'inthe plane of the main lock .pawl and'the teeth on 'the' drum. A centrifugal pawl is mounted on the main lock pawl in such a manner that when the drum is given a sudden impulse by the" rapid unwinding of the rope therefrom the said centrifugal pawl will move outward into engagement with the ratchet ring. and thereby force the main lock pawl out of' engagement with the drum and into engageinent with the ratchet ring. This operation puts the power spring in action to wind up rope upon the drum.

Mounted on the intermediate member is a second pawl which I will refer to hereinafter cated within the drum. bend 13 on its outer end which engages a.

The inesnoeo as the automatic set-pawl. This pawlis'also in the plane of the ratchet ring and rrieans are provided whereby when the power springis wound up to a.predetermined'pointsthe automatic set pawl is automatically fwith; draw1 1"from engagement with the ratchet ring and whereby when the power 'spring has' relaxed or unwound a predetermined:

amount said automatic set pawl is caused to engage the'ratchet ring thereby holding the" intermediate rnember from rotation when the rope is unwound from thedrum-tosetthe power spring. A bell crank is also mounted on the intermediate member in the plane-ofther'atchet ring the said bell crank forrning;-

- a preferred means for automatically throifv-v ing. the automatic set pawl into and out of i same.- time formin Tani automatiosto'p' tolimit the amount 0 setting or winding up of automatically by axlug secured to the power spring allof which will beinore, particularly described and explained hereinafter;

Inthe drawings accompanyingand form, ing part of this specification Figure 1v is aver tical section through the axis 'of-the she-ave I on .line a-a of Fig. 2. i Fig. 2 isa section'on line b bof Fig. 1. Figfi. ,3 ndfe-are sections vcorresr'ioriding wit" Fig.1? 1n some of the parts have been omitted inorder engagement with the ratchet ring and .at the to show the different operative. sitionsof;

certain parts. Fig. 5 isa partia sectioned line dd of Fig. 2. Fig.6 is apartial View of a car ro videdwith my invention showing the di erentpositions of'the trolley po'le and trolley rone.' portion of the trolley rope.- Fig-Sis apartia'l view of the powerspring, and Fig.3 .9 isa v view ofamodified power sprlng." v

' The referenced characters are used in the, same sense throughout theIldrawings and specification.

' Fig; 7 is an enlarged view of a a Numeral'l represents the back of the frame orcase which incloses the mechanism.

2 is av steel shell forming the front portion of the in'closing case; a n n 3-is ashaft mounted in the back -1 and I'ro shell 2" having a threaded end' i, engaged by the thumb-nut 5 and a disk 6 secured to itsouter end. The disk 6 has an inner projectmg hub 7 which engages tension spring 8'.

the innerendof the p v 9 is the drum on which the trolley rope wound. The outer end of the tensionsprin'g 8 engages thedrum 9..

10 represents the trolley rope. -11 represents the power spring which is lo- .It has a hook or cored recess 12 formed in thedrum. ner end of the power spring 11 engages a groove 14 in'the sleeve or hollow arbor 1'5 which is formed integrally with the intermee j diate-meniber or pawlxcarrying flange 16.

intermediate member 16.

The pawl carrying flange or intermediate ratchet ring is a normally stationary mem- 1 of the intermediate 16.

an arm 36 extending down in front of there 'triever spring 11 and the end of said arm is her and is loosely mounted in the back 1 and it has external teeth 26 as well as the internal teeth 24. The external teeth are engaged by the pawl The pawl 27 is mounted on the shaft 28 in the back 1.

29is a centrifugally controlled pawl having its end in pivotal connection with the pawl 20.

30 is a spring secured at one end to the pawl 20 and at the other end to the lug 31 on the pawl-carrier 16.

32 is a spring having one end attached to the pawl carrier 16 and the other end to the centrifugal pawl 29.

ITheparts thus far are similar in their action EIIldCOIISi-IUCUOH to thecorresponding parts in an earlier application filed by me Aug lyl904, Serial No. 218 978 33 a bell-crank mounted on the stud 34 This bell-crank has "provided with a projecting lug 37 which exretriever spring.

tends toward the retriever spring 11 in the plane of the projecting lug 38 attached to the The lug 38 attached to the retriever spring 11 is preferably located on the outer coil of said retriever spring be tween one-half and three-quarters of the way around from the hook 13.

When the retriever spring is fully relaxed the outer coils lie close to the circumference of the recess of the drum and the outer end of the lug 37 is so located that the lug 38 will --pass over the lug 37 without touching it until wound up. 5 o

the lug 38 has moved in toward the center a certain amount as the retriever spring is 39 is a spring mounted on the stud 34 having one end attached to said stud and the other end engaged with the bell-crank 33.

This spring acts upon said bell-crank to give 1t left-handed 'lOllSlt-IOII as seen in Figs. 2, 3

'401sapawl mounted on the stud 41 of the and 41 l intermediate member 16, which pawl I will 'f'setpawl having one of its ends secured to the automatic set pawl and the other end engag- 42 is" a springi'nounted on the automatic the pin 21 of the Fig. 3.

ing the arm 43 of thebell-crank 33. The action of said spring is to hold the arm 43 111 engagement with the automatic set pawl 40 and at the same time it permits the. automatic sct pawl to remain in engagement with the ratchet ring when the. bell-crank isacted upon by the lug 38 as shown in Fig. 4.

The operation of my invention is-as follows: When the powerspring is fully set and the parts are in their normal condition they will be asrepresented in Fig. 2. The main lock pawl 20 will be in engagement with one of the teeth 19 on the drum, the centrifugal pawl 29 beldagainst its banking on the intermediate member 16. The lug 38 in contact with the lug 37 of the bell-crank 3.4 will hold the automatic set pawl 40 out of engagement with the ratchet ring. In this condition the drum will be under the action of the tension spring 8 and the trolley rope may be wound up or unwound to any extent thereon. When the rope is rapidly unwound from the drum, as when the trolley jumps the wire,..the sudden impulse or rapid rotation of the drum. will cause the centrifugal pawl 29 to move outward and make engagement with one of the ratchet teeth 24 of the ratchetring and force the main-lock pawl 20 out of engagementwith the teeth 19 of the drum and. into engagement with one of the teeth of the ratchet ring as shown in Fig. 3. Immediately after the main lock pawl has beendisengaged from the drum the drum will be acted upon by the power spring 11 which will rotate the drum in a right:

handed direction as seen in Figs. 2, 3, and

4, therebywinding up the trolley lrope onthe drum with sufficient power to pull down the trolley pole. When this has taken place the parts will be in the position shown in Immediately after the. main lock pawl has been released from the drum and made engagement with the ratchet ring the intermediate member 16 will be held stationary and as the drum starts to revolve the lug 38 on the power spring will be carried away from lug. 37 of the bell crank 33 thereby permitting the spring 39 to, act upon said bellcrank and move the automatic set pawl 40 out against the ratchet ring. During this operation the trolley will be pulled down until the power spring acting to wind up the trolley rope on the drum, and the trolley too base springs acting to force the trolley up- 7 be pulled out of engagement with the ratchet ring. Whenthis has taken place. the automatic set pawl will move into engagement with one of the teeth of the ratchet ring and position against the arm' 43 of the the rope down a to turn in the opposite 'in Figs. 2, 3 andd, and the It will be apparent that prevent the unwinding of the rope from the drum. Ifthis does not take place the main lock pawl may be easily released from its engagement with the ratchet ring short distance so as to sufficiently relax the power spring. i

. To set the retriever after it has operated as. above, it is only necessary to pullout the trolley rope thereby unwinding the same and turning the drum in a left-handed direction as seen in Figs. 2, 3 and 4. As the rope is pulled out and the drum revolves, the intermediate member 16 being prevented from turning by the engagement of the automatic set pawl with the ratchet ring, the power spring will 38 engages the lug '37 of the bellcrank and causes the arm 43 of said bell-crank to move into engagement with one of the ratchet teeth 19 on the drum. This engagement s'tops the unwinding of the drum although :the automatic set pawl 40 is stil in engage- .ment with the ratchet ring as is clearly seen in Fig. 4. As soon however, as the pull on the trolley rope is relaxedthe drum will start direction, to the right main loch pawl 20 will engage one of the teeth 19 on the drum, and thus relieve the automatic set pawl from pressure against the teeth of the ratchet ring. The automaticset pawl will thereupon under his hands it will not be rewound back upon the drum. If it is partially set and the rope is ulled' down so as to overcome the upward pull of the trolley pole the tension spring will caus'e the drum to take upthe slack and the automatic set pawl 40 will ride backward over the ratchet teeth of the ratchet ring under the action of the tension spring. The main lock pawl however, dropping into engagernent with the teeth 19 of the drum will whatever set has previously been given to the power spring. The eiiect of this feature if operation is-that in the act of setting, the pole may be brought down close to the-roof of the car and reciprocated back and forth in short strokes.

In Fig. 6 I have illustrated the end of a trolley car equipped with my improved trolley retriever in which 44 represents the trolley wire, 15 the trolley pole, 10the trolley rope, jfigthe grip or enlarged portion thereof, and

retain by pulling be wound up or set until the lug usual manner.

tends senses 4-7 that portion which may be wound into the retriever which is of relatively small diameter. A represents the position of the trolley on the wire. B represents the position to which it rises after jumping the wire,

which the powerspring beg ns to act. (3

represents the position to which it is brought Now if the trolley jumped by the retriever. the wire and were brought down to the position 0 while the car was in rapid motion, it

would beunsafe to begin to draw out therope to set the retriever from this point because in so doing, the'trolle y would rise-above Moreover the the wire to the position B. height of the wire is likely to change somewhat. In the operation of my retriever as will be readily understood from the foregoing description, after the trolley has been brought down to the position (7 the conductor may take hold of the rope anl-pull it down to the iprocate the trolleyposition D and then re back and forth from position D to position until the retriever is fully set, after which he may replace the trolley to the wire in the The grip 46 is so located that when the trolley is in position D,'the grip will be where it can be conveniently taken hold of by the conductor.

The grip 46 may be braided'into the rope while the rope is being made or it may be applied after the rope is made by winding any suitable material, such for instance, as electric tape, around the rope at the proper point.

Or two difi'erent sizes of rope may be joined together using a rope of relatively small diameter for the'lower portion which is wound around the drum and the rope of relatively large diameter for that portion whichv expole. hen this latter construction is employed I may use a wire rope for that portion from the junction up to, the trolley which is wound around the drum usinga section of-cotton rope of an appropriate diameter to connect the wire ropewith the trolleypole.

I prefer to locate the lug 38 as shown'in Fig. 8 on the inside of the outer coil of the power spring and to so arrange the top of the lug 37 th at the lug 38 will pass over it in the first two or three revolutions according to the amount thatit is desired to pull the pole down. v

In lieu of placing the lug 38 on one of the outer coils of the spring. 11 and arranging the lug 37 so that the lug 38 will pass over it during so many revohitions as it is desired to have the drum maize before operating the bell-crank 331, I may locate the lug at an intermediate point between the outer and innor ends of the spring, so that, the sleeve 15 to which the inner end of the spring is attached. being stationary the lug 38 will make one or less than one revolution for the remade by the drum, for, it is obvious, referring to the Fig. 9 that if the inner end of the spring is held stationary and the outer one is caused to make a certain number of revolutions a lug securedbetween the inner and outer ends oft-he spring may be so located as to give any desired fraction of the number of revolutions less than that made by the outer end of the spring.

The ratchet ring is normally stationary being held by the pawl 27. It may however, be released at' any time by detaching the pawl 27 from engagement therewith, the pur ose of this construction being to ermit the immediate restoration of the tro ley to the wire after it has been pulled down before setting the retriever. It will be obvious however, that the internal ratchet teeth 24 may be cast integrally with or permanently attached to the back 1 without changing the mode of operation of the other parts of the mechanism.

In the type of retriever to which I have applied my invention as herein described the power spring has one of its ends permanently engaged with the drum and the other end with the intermediate memberslfi, and when the power spring is set either partially or wholly both of the ends of said spring are retained by the drum; the .power spring being thrown into action by releasing one of the ends of the spring from the drum through the instrumentalities of the intermediate member'16 and the main lock pawl 20. l\.'[y invention is not limited to any-particular type of retriever.

Having thus described my invention what I claim is:

p 1. In a trolley retriever the combination with three relatively movable members; one constituting a drum, another a normally stationary member, and another an intermediate member, and a power spring having one end attached to the intermediate member and the otl: r end to one of the other of said members, of means automatically connecting said intermediate member with the drum wh1le the drum is moved in one direction and ,mea'n' automatically connecting said inter- ..mediatemember, with the normally stationary member while it is'moved in the other direction, during the setting of said power spring.

2; In a trolley retriever the combination with three relatively movable members, one constituting a drum, another a normally stationary member, and another an intermediate member, of a power spring having one end socured to the intermediate member and the other end to one of the other of said members with ratchet and pawl. connections between the intermediate member and the drum, and between the intermediate member and the i normally stationary member, such that dur ing the setting of the power spring the turn- .posite direction will cause the engagement of ing of the drum in'onc direction will cause the engagement of the ratchet connections between the intermediate member and the drum and the turning of the drum in the op the ratchet connections between the intermediate member and the normally stationary member. a

3. In a trolley retriever the combination with three: relatively movable members, one

constituting a drum, another a normally stationary member, and another an intermediate member,'of a power spring normally set in a strained condition, having one end secured to the-intermediate member and the other end to'one of the other of said members, means to connect the intermediate member with the drum when the drum is turned in one direction, and means to connect the intermediate member with the stationary-member when the ,drum is turned in the opposite direction, thrown into action automatically during the setting of said power spring. I i

4. In a trolley retriever the combination with three relatively movable members, one constituting a drum, another a normally stationary member, and the third an intermediate member and a power spring having one end secured to the intermediate member and the other end to one of the other said memb'ers, said power spring being normally held in a set or strained condition and inactive to produce rotation of said drum, means. for throwing said power spring into action to 1'0- tate said drum, and power spring setting; means, automatically connecting said intermediate member with the drum while the drum is turned in one direction and with the stationary member while turned in the opposite direction during the setting, and means for automatically throwing said setting means out of action when said power spring has been set to a predetermined limit.

5. In a trolley retriever the combination with three relatively movable members, one constituting a drum, another a normally stationary member and the third an intermediate member, and a power spring having one end secured to said intermediate member and the other end to one of the other members, and holding means automatically thrown into action to hold said intermediate member to said drum while the drum is turned in one direction and holding means automatically thrown into action to hold said intermediate member to said normally stationary member while it is turned in the opposite direction during the setting of the power spring.

6. In a trolley retriever the combination with three relatively movable members, one constituting a drum, another a normally stationary member and the thirdan intermediate member and a power spring havingonc ond secured to said intermediate member and the other end to one of the other members,and

. holding means automatically thrown into ac- 'tion to hold said intermediate member to said drum while the drum is turned in one direc- I tion and holding means automatically thrown into action to hold said intermediate member to said-normally stationary member while it isturn'ed in the opposite direction, and means for automatically throwing the holding means between said intermediate membenand one of the other said members out of action when the power spring has been set to a predetermined limit.

- secured to the intermediate member and the other to one of the other of-said members, of an automaticstep by step setting mechanism operated by the rotation of the drumi'n the V dire'ctionto unwind the rope therefrom.

8. Inia trolley retriever the combination with three relatively movable members, one constituting a drum, another a normally stationary member and another an intermediate member, and a power spring having one end secured to the drum and the other end. to the I intermediate member, of means for automatically connecting the intermediate member with the drum while the drum turns 1n one direction and means for automatically con necting said intermediate member with said stationary member whileit turns in the opp0- site direction during the setting of said power spring:u

9. a trolley retriever the combination with three relatively movable members, one constituting a drum, another a normally stationary member and another an intermediate member, and a power spring having one .end secured to the drum and the other end to the intermediate meIII 061,Of means for automatically connectingthe intermediate memher with the drum While the drum turns in one direction and means for automatically connecting said intermediate member with said stationary member while 1t turns in the opposite direction during the settin said means including means for freeing sai( inter-' mediate member from one, and leaving it in engagement with the other, of said members after said power spring has been .set a predetermined amount.

'10. In a trolley retriever thecombination with three relatively movable members, one

constituting a drum, another a normally sta tionary member, and the third an 1ntermed1- ate member, and apower spring having one end secured-to the drum and the other end to the intermediate member, of means for automatically connecting the intermediate mem her with the drum while the drum turns in one direetion and means automatically connesting the intermediate member with said canoes stationary member while thedrum turns in the opposite direction during the setting of said power spring, and an automatic stop to prevent the setting of said power spring beyond a predetermined limit.

i 11. In a trolley retriever the combination with a drum, and a power spring adapted to be thrown into action by the rotation of said drum to wind up the trolley rope, during which said power spring unwinds, of means automatically thrown into action by the unwinding of said power spring to cause the unwinding of rope from the drum to rewind said power spring. 12. In a trolley retriever the combination with a drum adapted to receive the trolley rope of a power spring normally in a set condition adapted to be thrown into action by the rotation of said drum, to wind up the trolley rope, and means automatically thrown into action for retaining said power spring at int-ervalswhile it is being reset.

' 13. In a trolley retriever the combination with a drum adapted to receive the trolley rope, of a spring, normally under strain and adapted to be thrown into action by the sudden acceleration or rapid rotation of said drum to wind up the trolley rope; and,

means automatically thrown into action 43 111- ing said action of said spring whereby thenn winding of the rope from said drum will wind up'or set said spring.

14:. In a trolley retriever the combination with a'drum adapted to receivefth'e trolley rope of a spring normally under strain adapted to be thrown into action by the sudden acceleration or rapid rotation of said drum to wind up the trolley rope, "nd means auto maticallythrown.- into aotio by the unwind-- ing of rope from said drum-to set said power sprin and meaiis 'tdftain said spring at in- I terva s.

1-5. In a trolley retriever the combination aith a drum, a tension spring and a power spring of a ratchet and pawl retaining mech anism automatically thrown into action to hold said powerspring in a plurality of stages while it is being set.

16. hi a trolley retriever the combination with a drum, a tension spring and a'p'ower spring or the ratchet and pawl retaining mechanism automatically; thrown into action to hold said power spring in a plurality of stages while it is being set and an automatic stop to limit the amount to which said power spring isset.

17. In a trolley retriever the combination with a drum, a tension spring. and a power spring of a ratchet and pawl retainingmech anism automatically thrown into action to hold said spring in a plurality of stages during the setting and means for automatically throwingsaid rate t andpawl connectmg sprang has been'set to a predetermined limit.-

rne-ehanism out of a tion when said power 18. In a trolley retriever the combination with three relatively movable members, one

constituting a drum, another a normally stationary member, and another an intermediate memben'and a power spring having one end. Secured to the intermediate member and the other'end to one of the other of said members, of ratchet and pawl connections between said intermediate member and said stationary member and ratchet and pawl connections between said intermediate member and said drum and meansfor automatically throwing'both of said ratchet and paw} connections into action.

19. In a trolley retriever the combination with threerelatiyely movable members, one constituting a drum, another a normally stationary member and another an intermediate member, and a power spring-having one end attached to the intermediate member and the other-end to one of theother of said memberswot' ratchet and pawl connections between said intermediate member and said stationary member andratchet and pawl connections between said intermediateimenr ber and said drum, means tor automatically throwing both of said ratchet and pawl connections into action and means for automatlcally throwing one oi said ratchet and pawl connections out of action when said power spring has been set a predetermined amount.

20. ,ln a trolley retriever the combination with adrum, a tension spring and a power spring of a lug secured to said power spring intermediate its two ends, a setting mecha n' ism for said power spring and means engaging said lug to throw said setting=mechanism into action.

21. In a trolley retriever the combination with a drum and a power spring adapted to be thrown intoaction to rotate said drum, of a setting mechanism for said powenspring and means engaging said power pring i'nte mediate its two ends to throw said mechanism into action.

22. In a trolley retriever the combination with a drum, and a power spring oi a setting mechanism, a lug secured to said power spring intermediate its no ends and means actuated by engav with said to limit the setting of said power spring.

23. In a trolley retriever the combination with three relatively movable members, one

constituting a drum, another a normally sta tionary member. and another an interme diate member, and a power springhaving one end attached to th intermediate member and-the other end to one of'the'other of said members, a hug secured to said power spring connections between the said intermediate .member and one of the other of said members adapted to be thrown into and out of action by engagement with said lug.

24. In a trolley retriever the combination "with two members one constituting n. drum,

the other a normally stationary member and a power spring,

one of said members, means for automatically releasing one ol the ends ofsaid spring from the member by which it is normally held andconneoting saidrcleased end to the other member to bring said drum under the action of said power spring, and automatic means for retaining the said released end of said spring by said stationary, member and said drum alternatelyavhen said drum is rotated alternately in opposite directions,

25. In a trolley retriever the combination with a drum oi a power spring adapted to be thrown into actionby the rotation of said drum, to wind up the trolley rope, of means automatically thrown into action during the winding up of said trolley rope to cause the unwinding of rope from said drum to reset said power spring. I i

normally in'a strained con-' dition and-having its two ends retained: by

26. In a trolley retriever the combination with a drum adapted to receive the trolley rope, a tension spring and a power spring of. a

set mechanism for the power spring' thrown to said drum when said drumis turned in 0 e direction and automatic means for locking said intermediate member to said stationary member whenthe drum is turned in the opposite direction. i

'28. In a trolley retriever the combination with a drum a stationary member and an intermediate member of a power sprin having one and secured to said drum and tie other end to said intermediate member, retaining means on said intermediate member adapted to engage the drum when the drum is turned in one direction and to engage the stationary member when it is turned in the opposite direction.

29., Ina trolley retriever the combination with a drum a stationary member and an intermediate member of a power spring,'having one end secured tosaid drum and the other end to said intermediate member, re-

taining means on said intermediate member adapted to engage the drum when the drum is turned in one direction and to en age the stationary member when it is turned in the opposite direction, and means for automatically freeingsaid intermediate member from.

said stationary" member when said power spring is wound'up to-a predetermined innit. 30. In a trolley retriever the combination with adrum a stationary member and an intermediate member ofa pawl upon saidii'ntermediate member engaging teeth upon a drum a stationary member and an inxte'rmedi-ate member, of a power spring sen aember, a-pawl upon said intermediate mem-' adapted toengage-teeth upon said drum cured tofs'aid drum and said intermediate jand means "for throwing said pawl into engagement with-said teeth to prevent the relative rotation of said drumand said intermediate member when said power springlias been wound up to a predetermined limit. 3-2. In a trolley retriever the combination with 'adrum adapted to receive the trolley ropepa tension spring and a power spring, of

"' m'eans for retaimngsaid power vspring when said drum rotates under the a'ction of said esaeso tension spring and means for causing the unwinding of rope from said drum to set said power spring-and a-trolley-r0pehaving an en- 0 arged portion for the grip. I r 33., In a'troll'yretriever the combination with thedruin; the tension spring and the power spring, of reciprocating setting means\ and a rope having an enlarged grip portion. 35 34. In a trolley retriever the combination with two relatively movablemembers, one

' constituting admin and the othera normally stationary member, and a power spring hav- 7 ing one of its ends secured to one of'said' mem- 1o bers, of mechanism automatically connecting the other end of said power spring-with the drum when the drumis tnrnedEin onedirec.

tio n and with said nonnally stationary mem- I her when the-drum. is tinned-in "the opposite 5 direction, during the setting of said: powerspring. v In testimony whereof, I have signedmy name to thisgp'eeification'in the presence of two subscribing witnesses.

',CHARLES 'I. EARLL. Witnesses-r GEO. E. HARDY, Exam 0'. NEwKnAN'rL 

